Improvement in the manufacture of artificial stone from blast-furnace cinder



LLRLUUIHV COATING OR PLASTIC FRITZ LURMANN, OF GEORGSMARIEXHTL TTE, N EAR OSNABR Q TCK, PI-IUSSIA.

IMPROVEMENT IN THE MANUFACTURE OF ARTIFICIAL STONE FROM BLAST-FURNACE CINDER.

Specification forming part of Letters Patent No. 125,312, dated April 2, 1872.

furnace cinder and, placing it in a suitable vessel or receiver, granulate the same either by pouring in water or by mechanical means, and then mix it with quicklime or other caustic material or cement. ie mass is then put into moulds or otnerwlse collected and pressed or formed into any required shape, using for the purpose either hand force, steam power, or hydraulic pressure. The composition or artiele into which it is thus formed is afterward hardened by exposure to the air. no artificial heating or burning being necessary. The proportion of cinder to the quicklime or other caustic material or cement will vary according to the chemical properties of the materials used and other circumstances.

\Yhat is here claimed, and desired to be secured by Letters Patent, is

The composition of matter herein described, composed of the cinder of blastt'urnaccs and quicklime, or other caustic material or cement, for use as artificial stonein building and other purposes.

Witnesses:

PETER BARTHEL, FRANZ WIRTII.

Flt. LURMAXX. 

